Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DD-4686 REF NO 12 found under Bearing Sleeve by Cunico Corporation. The National Stock Number assigned to this part is 3120010920158, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DD-4686 REF NO 12.